Which of the following is a characteristic of volatile memory?

Volatile memory is characterized by the fact that it requires power to maintain the stored information. When the power is turned off, any data held in volatile memory is lost. This makes it distinct from non-volatile memory, which retains data even after power is removed. Common examples of volatile memory include RAM (Random Access Memory), which is used by computers to store data that is actively being used or processed. The loss of data when power is lost is a key aspect that defines volatile memory, making this answer correct.